On Apr 20, 6:41*pm, "Dale Parfitt" wrote:
"RHF" wrote in message

...



IIRC - Some Shortwave Radio Listeners (SWLs) have been
know to attach a different Wire Antenna Element to each of
the Taps on an ICE-180 and Feed {Mix} All the Signals into
One and send them down the Coax Cable to their Radio /
Receiver. ;-}

ICE 180 a Reasonably Priced Professional Matching Unit
-by- John Doty
http://www.hard-core-dx.com/nordicdx...ed/ice180.html

ICE 180A Beverage Matching Unit
http://www.iceradioproducts.com/reconly.html
I.C.E. = Industrial Communication Engineers, Ltd.

Multi-Element Inverted "L" Antenna using an ICE-180
Matching Transformer is an 'interesting and 'tempting' Idea.

Mount the ICE-180 Matching Transformer on a Ground Rod
and use Four Separate Inverted "L" Antennas with a Space
Bar at the Base giving 3"~6" between the Vertical-Up-Legs
of the "L"s. *Beyond this Rig the Vertical-Up-Legs Tops and
the Horizontal-Out-Arm Ends separately and independent
from each other.

- Don't fall into the trap of thinking that the "separate"
- antennas function as separate antennas.
-
- eg: 2 dipoles running at right angles to one another
- (a + sign as viewd from above) and fed together does
- not result in a near omni antenna, but rather as a single
- dipole run at 45 degrees to the "+" configuration.
-
- Now, if you were to remotely switch each antenna,
- that would be a different story.
- Dale
-

Dale [W4OP],

NOTE : For the sake of this discussion all Four of the
Inverted "L" Antenna Elements are co-aligned in the
same Vertical Plane.

The ICE 180 Matching Transformer 'acts' as the Collection
Point for each of the Signals coming from the Four 'individual'
Wire Antenna Elements.

In this instance the Four Taps on the Antenna Side of the
ICE 180 Matching Transformer 'act' as a Summing Network.
The Output of which is fed {transferred} to the Coax Cable
Side of the ICE 180 Matching Transformer.

Each of the Wire Antenna Elements is 'separated' in Space.
15.1 Feet & 19.7 Feet & 24.5 Feet & 38.5 Feet
Deltas : 4.6 Feet & 4.8 Feet & 14 Feet = 23.4 Feet

Each of the Wire Antenna Elements is a 'different' Length
-wrt- Wave Length; and therefore 'unique' to itself.
39.6 Feet & 51.5 Feet & 63 Feet & 97.7 Feet

Collectively All of the Wire Antenna Elements add-up-to
More Wire In-the-Air and a Greater Signal Capture Area.

More Wire In-the-Air :
39.6 Feet + 51.5 Feet + 63 Feet + 97.7 Feet = 251.8 Feet Long

Greater Signal Capture Area :
300 Tap "L" by itself : 15.1 x 24.5 / 2 = 185 Sq. Ft.
450 Tap "L" by itself : 19.7 x 31.8 / 2 = 313 Sq. Ft.
600 Tap "L" by itself : 24.5 x 38.5 / 2 = 472 Sq. Ft.
800 Tap "L" by itself : 38.5 x 59.2 / 2 = 1140 Sq. Ft.
Collective Areas : 2110 Sq. Ft. filled with Four Wire Antenna
Elements versus anyone of the single Elements.

Summary :
All of this is not 'scientific' but simply a practical approach
to puting : More Wire In-the-Air by using a specific feature
of the ICE 180 Matching Transfromer : The Taps.


yes - i know that 'in-theory' i am wrong
-but- practically speaking i am . . .
sort-of kind-of right - iane ~ RHF